User Registration Advanced Fields 1.6.8

* Feature - Add tooltip to advanced fields.
* Dev - Quantity field support for range field.
* Dev - Add payment slider enabled class for range field.
* Tweak - Tooltip texts made more meaningful.
* Tweak - Replace incremental file name function with WordPress default
* Fix - Select All Translation issue.
* Fix - Conditional Logic enabled required field issue.
* Fix - Remove uploaded profile picture if the user doesnot register.

* Fix - Profile picture required issue even if uploaded.
* Fix - Profile Picture removed when updated.

* Enhance - Remove profile image file from directory when user is deleted.
* Enhance - Profile Picture upload to `user_registration_uploads/profile-pictures` folder.
* Enhance - Remove profile image file from directory when profile image is removed by user.
* Tweak - Profile picture upload method.
* Tweak - Incremental file name for duplicate files.
* Tweak - Update `user_registration_profile_pic_url` user meta from url to attachment id.